Vol. 10, Issue 10 (2021)

Author(s):
NV Dalvi, BR Salvi, CD Pawar, MM Burondkar, VG Salvi, JS Dhekale and RG Khandekar

Abstract:
Tuberose (Polianthes tuberosa L.) is one of the important loose and cut flower cultivated commercially due to pleasant fragrance, longer vase-life of spikes, higher not returns and wide adaptability to varied climate and soil. In this view to study the effect of different growth regulators on production of spikes and flowers in tuberose was carried out at Department of Horticulture, College of Agriculture, Dr. Balasaheb Sawant Konkan Krishi Vidyapeeth, Dapoli during 2017 to 2019. The experiment was laid in Randomized Block Design with four replication. It consist of seven treatments viz., G₁- Gibberellic acid 50 ppm, G₂- Gibberellic acid 100 ppm, G₃- Cycocel 4000 ppm, G₄- Cycocel 5000 ppm, G₅- Tricontanol 4 ppm, G₆- Tricontanol 6 ppm and G₇- Control. During the period of investigation, plant height (75.09 cm), number of leaves (24.20), leaf area (72.64 cm²), LAI (2.42) and dry matter content were maximum in foliar application of GA₃ @ 100 ppm. The earliest commencement of flowering (73.24), days for 50 percent flowering (75.51), duration of flowering (22.74),spike length(106.1 cm),rachis length(47.58 cm), fresh weight of 100 flowers (258.65 g), length of floret(9.02 cm) and diameter of floret(6.00 cm)was observed maximum in CCC @ 5000 ppm. Maximum number of florets per clump (47.88) were recorded maximum in GA₃ @ 100 ppm. Maximum number of spikes per plant (1.98), per plot (39.50), flower yield per plot (2.34 kg) and per hectare (129.92 q) was recorded in CCC @ 5000 ppm. Among the various growth CCC@ 5000 ppm was found effective in improving yield of spikes and even highest B:C ratio (2.10).